/[svn]/linuxsampler/trunk/src/lib/fileloader/libgig/gig.cpp
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Contents of /linuxsampler/trunk/src/lib/fileloader/libgig/gig.cpp

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Revision 309 - (show annotations) (download)
Sun Nov 21 18:07:42 2004 UTC (15 years, 2 months ago) by schoenebeck
File size: 71211 byte(s)
* libgig: applied patch by Andreas Persson which improves accuracy of all
  three velocity response curves

1 /***************************************************************************
2 * *
3 * libgig - C++ cross-platform Gigasampler format file loader library *
4 * *
5 * Copyright (C) 2003, 2004 by Christian Schoenebeck *
6 * <cuse@users.sourceforge.net> *
7 * *
8 * This library is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This library is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this library; if not, write to the Free Software *
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21 * MA 02111-1307 USA *
22 ***************************************************************************/
23
24 #include "gig.h"
25
26 namespace gig {
27
28 // *************** Sample ***************
29 // *
30
31 unsigned int Sample::Instances = 0;
32 void* Sample::pDecompressionBuffer = NULL;
33 unsigned long Sample::DecompressionBufferSize = 0;
34
35 Sample::Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset) : DLS::Sample((DLS::File*) pFile, waveList, WavePoolOffset) {
36 Instances++;
37
38 RIFF::Chunk* _3gix = waveList->GetSubChunk(CHUNK_ID_3GIX);
39 if (!_3gix) throw gig::Exception("Mandatory chunks in <wave> list chunk not found.");
40 SampleGroup = _3gix->ReadInt16();
41
42 RIFF::Chunk* smpl = waveList->GetSubChunk(CHUNK_ID_SMPL);
43 if (!smpl) throw gig::Exception("Mandatory chunks in <wave> list chunk not found.");
44 Manufacturer = smpl->ReadInt32();
45 Product = smpl->ReadInt32();
46 SamplePeriod = smpl->ReadInt32();
47 MIDIUnityNote = smpl->ReadInt32();
48 FineTune = smpl->ReadInt32();
49 smpl->Read(&SMPTEFormat, 1, 4);
50 SMPTEOffset = smpl->ReadInt32();
51 Loops = smpl->ReadInt32();
52 uint32_t manufByt = smpl->ReadInt32();
53 LoopID = smpl->ReadInt32();
54 smpl->Read(&LoopType, 1, 4);
55 LoopStart = smpl->ReadInt32();
56 LoopEnd = smpl->ReadInt32();
57 LoopFraction = smpl->ReadInt32();
58 LoopPlayCount = smpl->ReadInt32();
59
60 FrameTable = NULL;
61 SamplePos = 0;
62 RAMCache.Size = 0;
63 RAMCache.pStart = NULL;
64 RAMCache.NullExtensionSize = 0;
65
66 Compressed = (waveList->GetSubChunk(CHUNK_ID_EWAV));
67 if (Compressed) {
68 ScanCompressedSample();
69 if (!pDecompressionBuffer) {
70 pDecompressionBuffer = new int8_t[INITIAL_SAMPLE_BUFFER_SIZE];
71 DecompressionBufferSize = INITIAL_SAMPLE_BUFFER_SIZE;
72 }
73 }
74 FrameOffset = 0; // just for streaming compressed samples
75
76 LoopSize = LoopEnd - LoopStart;
77 }
78
79 /// Scans compressed samples for mandatory informations (e.g. actual number of total sample points).
80 void Sample::ScanCompressedSample() {
81 //TODO: we have to add some more scans here (e.g. determine compression rate)
82 this->SamplesTotal = 0;
83 std::list<unsigned long> frameOffsets;
84
85 // Scanning
86 pCkData->SetPos(0);
87 while (pCkData->GetState() == RIFF::stream_ready) {
88 frameOffsets.push_back(pCkData->GetPos());
89 int16_t compressionmode = pCkData->ReadInt16();
90 this->SamplesTotal += 2048;
91 switch (compressionmode) {
92 case 1: // left channel compressed
93 case 256: // right channel compressed
94 pCkData->SetPos(6148, RIFF::stream_curpos);
95 break;
96 case 257: // both channels compressed
97 pCkData->SetPos(4104, RIFF::stream_curpos);
98 break;
99 default: // both channels uncompressed
100 pCkData->SetPos(8192, RIFF::stream_curpos);
101 }
102 }
103 pCkData->SetPos(0);
104
105 //FIXME: only seen compressed samples with 16 bit stereo so far
106 this->FrameSize = 4;
107 this->BitDepth = 16;
108
109 // Build the frames table (which is used for fast resolving of a frame's chunk offset)
110 if (FrameTable) delete[] FrameTable;
111 FrameTable = new unsigned long[frameOffsets.size()];
112 std::list<unsigned long>::iterator end = frameOffsets.end();
113 std::list<unsigned long>::iterator iter = frameOffsets.begin();
114 for (int i = 0; iter != end; i++, iter++) {
115 FrameTable[i] = *iter;
116 }
117 }
118
119 /**
120 * Loads (and uncompresses if needed) the whole sample wave into RAM. Use
121 * ReleaseSampleData() to free the memory if you don't need the cached
122 * sample data anymore.
123 *
124 * @returns buffer_t structure with start address and size of the buffer
125 * in bytes
126 * @see ReleaseSampleData(), Read(), SetPos()
127 */
128 buffer_t Sample::LoadSampleData() {
129 return LoadSampleDataWithNullSamplesExtension(this->SamplesTotal, 0); // 0 amount of NullSamples
130 }
131
132 /**
133 * Reads (uncompresses if needed) and caches the first \a SampleCount
134 * numbers of SamplePoints in RAM. Use ReleaseSampleData() to free the
135 * memory space if you don't need the cached samples anymore. There is no
136 * guarantee that exactly \a SampleCount samples will be cached; this is
137 * not an error. The size will be eventually truncated e.g. to the
138 * beginning of a frame of a compressed sample. This is done for
139 * efficiency reasons while streaming the wave by your sampler engine
140 * later. Read the <i>Size</i> member of the <i>buffer_t</i> structure
141 * that will be returned to determine the actual cached samples, but note
142 * that the size is given in bytes! You get the number of actually cached
143 * samples by dividing it by the frame size of the sample:
144 *
145 * buffer_t buf = pSample->LoadSampleData(acquired_samples);
146 * long cachedsamples = buf.Size / pSample->FrameSize;
147 *
148 * @param SampleCount - number of sample points to load into RAM
149 * @returns buffer_t structure with start address and size of
150 * the cached sample data in bytes
151 * @see ReleaseSampleData(), Read(), SetPos()
152 */
153 buffer_t Sample::LoadSampleData(unsigned long SampleCount) {
154 return LoadSampleDataWithNullSamplesExtension(SampleCount, 0); // 0 amount of NullSamples
155 }
156
157 /**
158 * Loads (and uncompresses if needed) the whole sample wave into RAM. Use
159 * ReleaseSampleData() to free the memory if you don't need the cached
160 * sample data anymore.
161 * The method will add \a NullSamplesCount silence samples past the
162 * official buffer end (this won't affect the 'Size' member of the
163 * buffer_t structure, that means 'Size' always reflects the size of the
164 * actual sample data, the buffer might be bigger though). Silence
165 * samples past the official buffer are needed for differential
166 * algorithms that always have to take subsequent samples into account
167 * (resampling/interpolation would be an important example) and avoids
168 * memory access faults in such cases.
169 *
170 * @param NullSamplesCount - number of silence samples the buffer should
171 * be extended past it's data end
172 * @returns buffer_t structure with start address and
173 * size of the buffer in bytes
174 * @see ReleaseSampleData(), Read(), SetPos()
175 */
176 buffer_t Sample::LoadSampleDataWithNullSamplesExtension(uint NullSamplesCount) {
177 return LoadSampleDataWithNullSamplesExtension(this->SamplesTotal, NullSamplesCount);
178 }
179
180 /**
181 * Reads (uncompresses if needed) and caches the first \a SampleCount
182 * numbers of SamplePoints in RAM. Use ReleaseSampleData() to free the
183 * memory space if you don't need the cached samples anymore. There is no
184 * guarantee that exactly \a SampleCount samples will be cached; this is
185 * not an error. The size will be eventually truncated e.g. to the
186 * beginning of a frame of a compressed sample. This is done for
187 * efficiency reasons while streaming the wave by your sampler engine
188 * later. Read the <i>Size</i> member of the <i>buffer_t</i> structure
189 * that will be returned to determine the actual cached samples, but note
190 * that the size is given in bytes! You get the number of actually cached
191 * samples by dividing it by the frame size of the sample:
192 *
193 * buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension(acquired_samples, null_samples);
194 * long cachedsamples = buf.Size / pSample->FrameSize;
195 *
196 * The method will add \a NullSamplesCount silence samples past the
197 * official buffer end (this won't affect the 'Size' member of the
198 * buffer_t structure, that means 'Size' always reflects the size of the
199 * actual sample data, the buffer might be bigger though). Silence
200 * samples past the official buffer are needed for differential
201 * algorithms that always have to take subsequent samples into account
202 * (resampling/interpolation would be an important example) and avoids
203 * memory access faults in such cases.
204 *
205 * @param SampleCount - number of sample points to load into RAM
206 * @param NullSamplesCount - number of silence samples the buffer should
207 * be extended past it's data end
208 * @returns buffer_t structure with start address and
209 * size of the cached sample data in bytes
210 * @see ReleaseSampleData(), Read(), SetPos()
211 */
212 buffer_t Sample::LoadSampleDataWithNullSamplesExtension(unsigned long SampleCount, uint NullSamplesCount) {
213 if (SampleCount > this->SamplesTotal) SampleCount = this->SamplesTotal;
214 if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
215 unsigned long allocationsize = (SampleCount + NullSamplesCount) * this->FrameSize;
216 RAMCache.pStart = new int8_t[allocationsize];
217 RAMCache.Size = Read(RAMCache.pStart, SampleCount) * this->FrameSize;
218 RAMCache.NullExtensionSize = allocationsize - RAMCache.Size;
219 // fill the remaining buffer space with silence samples
220 memset((int8_t*)RAMCache.pStart + RAMCache.Size, 0, RAMCache.NullExtensionSize);
221 return GetCache();
222 }
223
224 /**
225 * Returns current cached sample points. A buffer_t structure will be
226 * returned which contains address pointer to the begin of the cache and
227 * the size of the cached sample data in bytes. Use
228 * <i>LoadSampleData()</i> to cache a specific amount of sample points in
229 * RAM.
230 *
231 * @returns buffer_t structure with current cached sample points
232 * @see LoadSampleData();
233 */
234 buffer_t Sample::GetCache() {
235 // return a copy of the buffer_t structure
236 buffer_t result;
237 result.Size = this->RAMCache.Size;
238 result.pStart = this->RAMCache.pStart;
239 result.NullExtensionSize = this->RAMCache.NullExtensionSize;
240 return result;
241 }
242
243 /**
244 * Frees the cached sample from RAM if loaded with
245 * <i>LoadSampleData()</i> previously.
246 *
247 * @see LoadSampleData();
248 */
249 void Sample::ReleaseSampleData() {
250 if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
251 RAMCache.pStart = NULL;
252 RAMCache.Size = 0;
253 }
254
255 /**
256 * Sets the position within the sample (in sample points, not in
257 * bytes). Use this method and <i>Read()</i> if you don't want to load
258 * the sample into RAM, thus for disk streaming.
259 *
260 * Although the original Gigasampler engine doesn't allow positioning
261 * within compressed samples, I decided to implement it. Even though
262 * the Gigasampler format doesn't allow to define loops for compressed
263 * samples at the moment, positioning within compressed samples might be
264 * interesting for some sampler engines though. The only drawback about
265 * my decision is that it takes longer to load compressed gig Files on
266 * startup, because it's neccessary to scan the samples for some
267 * mandatory informations. But I think as it doesn't affect the runtime
268 * efficiency, nobody will have a problem with that.
269 *
270 * @param SampleCount number of sample points to jump
271 * @param Whence optional: to which relation \a SampleCount refers
272 * to, if omited <i>RIFF::stream_start</i> is assumed
273 * @returns the new sample position
274 * @see Read()
275 */
276 unsigned long Sample::SetPos(unsigned long SampleCount, RIFF::stream_whence_t Whence) {
277 if (Compressed) {
278 switch (Whence) {
279 case RIFF::stream_curpos:
280 this->SamplePos += SampleCount;
281 break;
282 case RIFF::stream_end:
283 this->SamplePos = this->SamplesTotal - 1 - SampleCount;
284 break;
285 case RIFF::stream_backward:
286 this->SamplePos -= SampleCount;
287 break;
288 case RIFF::stream_start: default:
289 this->SamplePos = SampleCount;
290 break;
291 }
292 if (this->SamplePos > this->SamplesTotal) this->SamplePos = this->SamplesTotal;
293
294 unsigned long frame = this->SamplePos / 2048; // to which frame to jump
295 this->FrameOffset = this->SamplePos % 2048; // offset (in sample points) within that frame
296 pCkData->SetPos(FrameTable[frame]); // set chunk pointer to the start of sought frame
297 return this->SamplePos;
298 }
299 else { // not compressed
300 unsigned long orderedBytes = SampleCount * this->FrameSize;
301 unsigned long result = pCkData->SetPos(orderedBytes, Whence);
302 return (result == orderedBytes) ? SampleCount
303 : result / this->FrameSize;
304 }
305 }
306
307 /**
308 * Returns the current position in the sample (in sample points).
309 */
310 unsigned long Sample::GetPos() {
311 if (Compressed) return SamplePos;
312 else return pCkData->GetPos() / FrameSize;
313 }
314
315 /**
316 * Reads \a SampleCount number of sample points from the position stored
317 * in \a pPlaybackState into the buffer pointed by \a pBuffer and moves
318 * the position within the sample respectively, this method honors the
319 * looping informations of the sample (if any). The sample wave stream
320 * will be decompressed on the fly if using a compressed sample. Use this
321 * method if you don't want to load the sample into RAM, thus for disk
322 * streaming. All this methods needs to know to proceed with streaming
323 * for the next time you call this method is stored in \a pPlaybackState.
324 * You have to allocate and initialize the playback_state_t structure by
325 * yourself before you use it to stream a sample:
326 *
327 * <i>
328 * gig::playback_state_t playbackstate; <br>
329 * playbackstate.position = 0; <br>
330 * playbackstate.reverse = false; <br>
331 * playbackstate.loop_cycles_left = pSample->LoopPlayCount; <br>
332 * </i>
333 *
334 * You don't have to take care of things like if there is actually a loop
335 * defined or if the current read position is located within a loop area.
336 * The method already handles such cases by itself.
337 *
338 * @param pBuffer destination buffer
339 * @param SampleCount number of sample points to read
340 * @param pPlaybackState will be used to store and reload the playback
341 * state for the next ReadAndLoop() call
342 * @returns number of successfully read sample points
343 */
344 unsigned long Sample::ReadAndLoop(void* pBuffer, unsigned long SampleCount, playback_state_t* pPlaybackState) {
345 unsigned long samplestoread = SampleCount, totalreadsamples = 0, readsamples, samplestoloopend;
346 uint8_t* pDst = (uint8_t*) pBuffer;
347
348 SetPos(pPlaybackState->position); // recover position from the last time
349
350 if (this->Loops && GetPos() <= this->LoopEnd) { // honor looping if there are loop points defined
351
352 switch (this->LoopType) {
353
354 case loop_type_bidirectional: { //TODO: not tested yet!
355 do {
356 // if not endless loop check if max. number of loop cycles have been passed
357 if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break;
358
359 if (!pPlaybackState->reverse) { // forward playback
360 do {
361 samplestoloopend = this->LoopEnd - GetPos();
362 readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend));
363 samplestoread -= readsamples;
364 totalreadsamples += readsamples;
365 if (readsamples == samplestoloopend) {
366 pPlaybackState->reverse = true;
367 break;
368 }
369 } while (samplestoread && readsamples);
370 }
371 else { // backward playback
372
373 // as we can only read forward from disk, we have to
374 // determine the end position within the loop first,
375 // read forward from that 'end' and finally after
376 // reading, swap all sample frames so it reflects
377 // backward playback
378
379 unsigned long swapareastart = totalreadsamples;
380 unsigned long loopoffset = GetPos() - this->LoopStart;
381 unsigned long samplestoreadinloop = Min(samplestoread, loopoffset);
382 unsigned long reverseplaybackend = GetPos() - samplestoreadinloop;
383
384 SetPos(reverseplaybackend);
385
386 // read samples for backward playback
387 do {
388 readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoreadinloop);
389 samplestoreadinloop -= readsamples;
390 samplestoread -= readsamples;
391 totalreadsamples += readsamples;
392 } while (samplestoreadinloop && readsamples);
393
394 SetPos(reverseplaybackend); // pretend we really read backwards
395
396 if (reverseplaybackend == this->LoopStart) {
397 pPlaybackState->loop_cycles_left--;
398 pPlaybackState->reverse = false;
399 }
400
401 // reverse the sample frames for backward playback
402 SwapMemoryArea(&pDst[swapareastart * this->FrameSize], (totalreadsamples - swapareastart) * this->FrameSize, this->FrameSize);
403 }
404 } while (samplestoread && readsamples);
405 break;
406 }
407
408 case loop_type_backward: { // TODO: not tested yet!
409 // forward playback (not entered the loop yet)
410 if (!pPlaybackState->reverse) do {
411 samplestoloopend = this->LoopEnd - GetPos();
412 readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend));
413 samplestoread -= readsamples;
414 totalreadsamples += readsamples;
415 if (readsamples == samplestoloopend) {
416 pPlaybackState->reverse = true;
417 break;
418 }
419 } while (samplestoread && readsamples);
420
421 if (!samplestoread) break;
422
423 // as we can only read forward from disk, we have to
424 // determine the end position within the loop first,
425 // read forward from that 'end' and finally after
426 // reading, swap all sample frames so it reflects
427 // backward playback
428
429 unsigned long swapareastart = totalreadsamples;
430 unsigned long loopoffset = GetPos() - this->LoopStart;
431 unsigned long samplestoreadinloop = (this->LoopPlayCount) ? Min(samplestoread, pPlaybackState->loop_cycles_left * LoopSize - loopoffset)
432 : samplestoread;
433 unsigned long reverseplaybackend = this->LoopStart + Abs((loopoffset - samplestoreadinloop) % this->LoopSize);
434
435 SetPos(reverseplaybackend);
436
437 // read samples for backward playback
438 do {
439 // if not endless loop check if max. number of loop cycles have been passed
440 if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break;
441 samplestoloopend = this->LoopEnd - GetPos();
442 readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoreadinloop, samplestoloopend));
443 samplestoreadinloop -= readsamples;
444 samplestoread -= readsamples;
445 totalreadsamples += readsamples;
446 if (readsamples == samplestoloopend) {
447 pPlaybackState->loop_cycles_left--;
448 SetPos(this->LoopStart);
449 }
450 } while (samplestoreadinloop && readsamples);
451
452 SetPos(reverseplaybackend); // pretend we really read backwards
453
454 // reverse the sample frames for backward playback
455 SwapMemoryArea(&pDst[swapareastart * this->FrameSize], (totalreadsamples - swapareastart) * this->FrameSize, this->FrameSize);
456 break;
457 }
458
459 default: case loop_type_normal: {
460 do {
461 // if not endless loop check if max. number of loop cycles have been passed
462 if (this->LoopPlayCount && !pPlaybackState->loop_cycles_left) break;
463 samplestoloopend = this->LoopEnd - GetPos();
464 readsamples = Read(&pDst[totalreadsamples * this->FrameSize], Min(samplestoread, samplestoloopend));
465 samplestoread -= readsamples;
466 totalreadsamples += readsamples;
467 if (readsamples == samplestoloopend) {
468 pPlaybackState->loop_cycles_left--;
469 SetPos(this->LoopStart);
470 }
471 } while (samplestoread && readsamples);
472 break;
473 }
474 }
475 }
476
477 // read on without looping
478 if (samplestoread) do {
479 readsamples = Read(&pDst[totalreadsamples * this->FrameSize], samplestoread);
480 samplestoread -= readsamples;
481 totalreadsamples += readsamples;
482 } while (readsamples && samplestoread);
483
484 // store current position
485 pPlaybackState->position = GetPos();
486
487 return totalreadsamples;
488 }
489
490 /**
491 * Reads \a SampleCount number of sample points from the current
492 * position into the buffer pointed by \a pBuffer and increments the
493 * position within the sample. The sample wave stream will be
494 * decompressed on the fly if using a compressed sample. Use this method
495 * and <i>SetPos()</i> if you don't want to load the sample into RAM,
496 * thus for disk streaming.
497 *
498 * @param pBuffer destination buffer
499 * @param SampleCount number of sample points to read
500 * @returns number of successfully read sample points
501 * @see SetPos()
502 */
503 unsigned long Sample::Read(void* pBuffer, unsigned long SampleCount) {
504 if (SampleCount == 0) return 0;
505 if (!Compressed) return pCkData->Read(pBuffer, SampleCount, FrameSize); //FIXME: channel inversion due to endian correction?
506 else { //FIXME: no support for mono compressed samples yet, are there any?
507 if (this->SamplePos >= this->SamplesTotal) return 0;
508 //TODO: efficiency: we simply assume here that all frames are compressed, maybe we should test for an average compression rate
509 // best case needed buffer size (all frames compressed)
510 unsigned long assumedsize = (SampleCount << 1) + // *2 (16 Bit, stereo, but assume all frames compressed)
511 (SampleCount >> 10) + // 10 bytes header per 2048 sample points
512 8194, // at least one worst case sample frame
513 remainingbytes = 0, // remaining bytes in the local buffer
514 remainingsamples = SampleCount,
515 copysamples;
516 int currentframeoffset = this->FrameOffset; // offset in current sample frame since last Read()
517 this->FrameOffset = 0;
518
519 if (assumedsize > this->DecompressionBufferSize) {
520 // local buffer reallocation - hope this won't happen
521 if (this->pDecompressionBuffer) delete[] (int8_t*) this->pDecompressionBuffer;
522 this->pDecompressionBuffer = new int8_t[assumedsize << 1]; // double of current needed size
523 this->DecompressionBufferSize = assumedsize;
524 }
525
526 int16_t compressionmode, left, dleft, right, dright;
527 int8_t* pSrc = (int8_t*) this->pDecompressionBuffer;
528 int16_t* pDst = (int16_t*) pBuffer;
529 remainingbytes = pCkData->Read(pSrc, assumedsize, 1);
530
531 while (remainingsamples) {
532
533 // reload from disk to local buffer if needed
534 if (remainingbytes < 8194) {
535 if (pCkData->GetState() != RIFF::stream_ready) {
536 this->SamplePos = this->SamplesTotal;
537 return (SampleCount - remainingsamples);
538 }
539 assumedsize = remainingsamples;
540 assumedsize = (assumedsize << 1) + // *2 (16 Bit, stereo, but assume all frames compressed)
541 (assumedsize >> 10) + // 10 bytes header per 2048 sample points
542 8194; // at least one worst case sample frame
543 pCkData->SetPos(remainingbytes, RIFF::stream_backward);
544 if (pCkData->RemainingBytes() < assumedsize) assumedsize = pCkData->RemainingBytes();
545 remainingbytes = pCkData->Read(this->pDecompressionBuffer, assumedsize, 1);
546 pSrc = (int8_t*) this->pDecompressionBuffer;
547 }
548
549 // determine how many samples in this frame to skip and read
550 if (remainingsamples >= 2048) {
551 copysamples = 2048 - currentframeoffset;
552 remainingsamples -= copysamples;
553 }
554 else {
555 copysamples = remainingsamples;
556 if (currentframeoffset + copysamples > 2048) {
557 copysamples = 2048 - currentframeoffset;
558 remainingsamples -= copysamples;
559 }
560 else {
561 pCkData->SetPos(remainingbytes, RIFF::stream_backward);
562 remainingsamples = 0;
563 this->FrameOffset = currentframeoffset + copysamples;
564 }
565 }
566
567 // decompress and copy current frame from local buffer to destination buffer
568 compressionmode = *(int16_t*)pSrc; pSrc+=2;
569 switch (compressionmode) {
570 case 1: // left channel compressed
571 remainingbytes -= 6150; // (left 8 bit, right 16 bit, +6 byte header)
572 if (!remainingsamples && copysamples == 2048)
573 pCkData->SetPos(remainingbytes, RIFF::stream_backward);
574
575 left = *(int16_t*)pSrc; pSrc+=2;
576 dleft = *(int16_t*)pSrc; pSrc+=2;
577 while (currentframeoffset) {
578 dleft -= *pSrc;
579 left -= dleft;
580 pSrc+=3; // 8 bit left channel, skip uncompressed right channel (16 bit)
581 currentframeoffset--;
582 }
583 while (copysamples) {
584 dleft -= *pSrc; pSrc++;
585 left -= dleft;
586 *pDst = left; pDst++;
587 *pDst = *(int16_t*)pSrc; pDst++; pSrc+=2;
588 copysamples--;
589 }
590 break;
591 case 256: // right channel compressed
592 remainingbytes -= 6150; // (left 16 bit, right 8 bit, +6 byte header)
593 if (!remainingsamples && copysamples == 2048)
594 pCkData->SetPos(remainingbytes, RIFF::stream_backward);
595
596 right = *(int16_t*)pSrc; pSrc+=2;
597 dright = *(int16_t*)pSrc; pSrc+=2;
598 if (currentframeoffset) {
599 pSrc+=2; // skip uncompressed left channel, now we can increment by 3
600 while (currentframeoffset) {
601 dright -= *pSrc;
602 right -= dright;
603 pSrc+=3; // 8 bit right channel, skip uncompressed left channel (16 bit)
604 currentframeoffset--;
605 }
606 pSrc-=2; // back aligned to left channel
607 }
608 while (copysamples) {
609 *pDst = *(int16_t*)pSrc; pDst++; pSrc+=2;
610 dright -= *pSrc; pSrc++;
611 right -= dright;
612 *pDst = right; pDst++;
613 copysamples--;
614 }
615 break;
616 case 257: // both channels compressed
617 remainingbytes -= 4106; // (left 8 bit, right 8 bit, +10 byte header)
618 if (!remainingsamples && copysamples == 2048)
619 pCkData->SetPos(remainingbytes, RIFF::stream_backward);
620
621 left = *(int16_t*)pSrc; pSrc+=2;
622 dleft = *(int16_t*)pSrc; pSrc+=2;
623 right = *(int16_t*)pSrc; pSrc+=2;
624 dright = *(int16_t*)pSrc; pSrc+=2;
625 while (currentframeoffset) {
626 dleft -= *pSrc; pSrc++;
627 left -= dleft;
628 dright -= *pSrc; pSrc++;
629 right -= dright;
630 currentframeoffset--;
631 }
632 while (copysamples) {
633 dleft -= *pSrc; pSrc++;
634 left -= dleft;
635 dright -= *pSrc; pSrc++;
636 right -= dright;
637 *pDst = left; pDst++;
638 *pDst = right; pDst++;
639 copysamples--;
640 }
641 break;
642 default: // both channels uncompressed
643 remainingbytes -= 8194; // (left 16 bit, right 16 bit, +2 byte header)
644 if (!remainingsamples && copysamples == 2048)
645 pCkData->SetPos(remainingbytes, RIFF::stream_backward);
646
647 pSrc += currentframeoffset << 2;
648 currentframeoffset = 0;
649 memcpy(pDst, pSrc, copysamples << 2);
650 pDst += copysamples << 1;
651 pSrc += copysamples << 2;
652 break;
653 }
654 }
655 this->SamplePos += (SampleCount - remainingsamples);
656 if (this->SamplePos > this->SamplesTotal) this->SamplePos = this->SamplesTotal;
657 return (SampleCount - remainingsamples);
658 }
659 }
660
661 Sample::~Sample() {
662 Instances--;
663 if (!Instances && pDecompressionBuffer) delete[] (int8_t*) pDecompressionBuffer;
664 if (FrameTable) delete[] FrameTable;
665 if (RAMCache.pStart) delete[] (int8_t*) RAMCache.pStart;
666 }
667
668
669
670 // *************** DimensionRegion ***************
671 // *
672
673 uint DimensionRegion::Instances = 0;
674 DimensionRegion::VelocityTableMap* DimensionRegion::pVelocityTables = NULL;
675
676 DimensionRegion::DimensionRegion(RIFF::List* _3ewl) : DLS::Sampler(_3ewl) {
677 Instances++;
678
679 memcpy(&Crossfade, &SamplerOptions, 4);
680 if (!pVelocityTables) pVelocityTables = new VelocityTableMap;
681
682 RIFF::Chunk* _3ewa = _3ewl->GetSubChunk(CHUNK_ID_3EWA);
683 _3ewa->ReadInt32(); // unknown, always 0x0000008C ?
684 LFO3Frequency = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
685 EG3Attack = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
686 _3ewa->ReadInt16(); // unknown
687 LFO1InternalDepth = _3ewa->ReadUint16();
688 _3ewa->ReadInt16(); // unknown
689 LFO3InternalDepth = _3ewa->ReadInt16();
690 _3ewa->ReadInt16(); // unknown
691 LFO1ControlDepth = _3ewa->ReadUint16();
692 _3ewa->ReadInt16(); // unknown
693 LFO3ControlDepth = _3ewa->ReadInt16();
694 EG1Attack = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
695 EG1Decay1 = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
696 _3ewa->ReadInt16(); // unknown
697 EG1Sustain = _3ewa->ReadUint16();
698 EG1Release = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
699 EG1Controller = DecodeLeverageController(static_cast<_lev_ctrl_t>(_3ewa->ReadUint8()));
700 uint8_t eg1ctrloptions = _3ewa->ReadUint8();
701 EG1ControllerInvert = eg1ctrloptions & 0x01;
702 EG1ControllerAttackInfluence = GIG_EG_CTR_ATTACK_INFLUENCE_EXTRACT(eg1ctrloptions);
703 EG1ControllerDecayInfluence = GIG_EG_CTR_DECAY_INFLUENCE_EXTRACT(eg1ctrloptions);
704 EG1ControllerReleaseInfluence = GIG_EG_CTR_RELEASE_INFLUENCE_EXTRACT(eg1ctrloptions);
705 EG2Controller = DecodeLeverageController(static_cast<_lev_ctrl_t>(_3ewa->ReadUint8()));
706 uint8_t eg2ctrloptions = _3ewa->ReadUint8();
707 EG2ControllerInvert = eg2ctrloptions & 0x01;
708 EG2ControllerAttackInfluence = GIG_EG_CTR_ATTACK_INFLUENCE_EXTRACT(eg2ctrloptions);
709 EG2ControllerDecayInfluence = GIG_EG_CTR_DECAY_INFLUENCE_EXTRACT(eg2ctrloptions);
710 EG2ControllerReleaseInfluence = GIG_EG_CTR_RELEASE_INFLUENCE_EXTRACT(eg2ctrloptions);
711 LFO1Frequency = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
712 EG2Attack = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
713 EG2Decay1 = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
714 _3ewa->ReadInt16(); // unknown
715 EG2Sustain = _3ewa->ReadUint16();
716 EG2Release = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
717 _3ewa->ReadInt16(); // unknown
718 LFO2ControlDepth = _3ewa->ReadUint16();
719 LFO2Frequency = (double) GIG_EXP_DECODE(_3ewa->ReadInt32());
720 _3ewa->ReadInt16(); // unknown
721 LFO2InternalDepth = _3ewa->ReadUint16();
722 int32_t eg1decay2 = _3ewa->ReadInt32();
723 EG1Decay2 = (double) GIG_EXP_DECODE(eg1decay2);
724 EG1InfiniteSustain = (eg1decay2 == 0x7fffffff);
725 _3ewa->ReadInt16(); // unknown
726 EG1PreAttack = _3ewa->ReadUint16();
727 int32_t eg2decay2 = _3ewa->ReadInt32();
728 EG2Decay2 = (double) GIG_EXP_DECODE(eg2decay2);
729 EG2InfiniteSustain = (eg2decay2 == 0x7fffffff);
730 _3ewa->ReadInt16(); // unknown
731 EG2PreAttack = _3ewa->ReadUint16();
732 uint8_t velocityresponse = _3ewa->ReadUint8();
733 if (velocityresponse < 5) {
734 VelocityResponseCurve = curve_type_nonlinear;
735 VelocityResponseDepth = velocityresponse;
736 }
737 else if (velocityresponse < 10) {
738 VelocityResponseCurve = curve_type_linear;
739 VelocityResponseDepth = velocityresponse - 5;
740 }
741 else if (velocityresponse < 15) {
742 VelocityResponseCurve = curve_type_special;
743 VelocityResponseDepth = velocityresponse - 10;
744 }
745 else {
746 VelocityResponseCurve = curve_type_unknown;
747 VelocityResponseDepth = 0;
748 }
749 uint8_t releasevelocityresponse = _3ewa->ReadUint8();
750 if (releasevelocityresponse < 5) {
751 ReleaseVelocityResponseCurve = curve_type_nonlinear;
752 ReleaseVelocityResponseDepth = releasevelocityresponse;
753 }
754 else if (releasevelocityresponse < 10) {
755 ReleaseVelocityResponseCurve = curve_type_linear;
756 ReleaseVelocityResponseDepth = releasevelocityresponse - 5;
757 }
758 else if (releasevelocityresponse < 15) {
759 ReleaseVelocityResponseCurve = curve_type_special;
760 ReleaseVelocityResponseDepth = releasevelocityresponse - 10;
761 }
762 else {
763 ReleaseVelocityResponseCurve = curve_type_unknown;
764 ReleaseVelocityResponseDepth = 0;
765 }
766 VelocityResponseCurveScaling = _3ewa->ReadUint8();
767 AttenuationControllerThreshold = _3ewa->ReadInt8();
768 _3ewa->ReadInt32(); // unknown
769 SampleStartOffset = (uint16_t) _3ewa->ReadInt16();
770 _3ewa->ReadInt16(); // unknown
771 uint8_t pitchTrackDimensionBypass = _3ewa->ReadInt8();
772 PitchTrack = GIG_PITCH_TRACK_EXTRACT(pitchTrackDimensionBypass);
773 if (pitchTrackDimensionBypass & 0x10) DimensionBypass = dim_bypass_ctrl_94;
774 else if (pitchTrackDimensionBypass & 0x20) DimensionBypass = dim_bypass_ctrl_95;
775 else DimensionBypass = dim_bypass_ctrl_none;
776 uint8_t pan = _3ewa->ReadUint8();
777 Pan = (pan < 64) ? pan : -((int)pan - 63); // signed 7 bit -> signed 8 bit
778 SelfMask = _3ewa->ReadInt8() & 0x01;
779 _3ewa->ReadInt8(); // unknown
780 uint8_t lfo3ctrl = _3ewa->ReadUint8();
781 LFO3Controller = static_cast<lfo3_ctrl_t>(lfo3ctrl & 0x07); // lower 3 bits
782 LFO3Sync = lfo3ctrl & 0x20; // bit 5
783 InvertAttenuationController = lfo3ctrl & 0x80; // bit 7
784 if (VCFType == vcf_type_lowpass) {
785 if (lfo3ctrl & 0x40) // bit 6
786 VCFType = vcf_type_lowpassturbo;
787 }
788 AttenuationController = DecodeLeverageController(static_cast<_lev_ctrl_t>(_3ewa->ReadUint8()));
789 uint8_t lfo2ctrl = _3ewa->ReadUint8();
790 LFO2Controller = static_cast<lfo2_ctrl_t>(lfo2ctrl & 0x07); // lower 3 bits
791 LFO2FlipPhase = lfo2ctrl & 0x80; // bit 7
792 LFO2Sync = lfo2ctrl & 0x20; // bit 5
793 bool extResonanceCtrl = lfo2ctrl & 0x40; // bit 6
794 uint8_t lfo1ctrl = _3ewa->ReadUint8();
795 LFO1Controller = static_cast<lfo1_ctrl_t>(lfo1ctrl & 0x07); // lower 3 bits
796 LFO1FlipPhase = lfo1ctrl & 0x80; // bit 7
797 LFO1Sync = lfo1ctrl & 0x40; // bit 6
798 VCFResonanceController = (extResonanceCtrl) ? static_cast<vcf_res_ctrl_t>(GIG_VCF_RESONANCE_CTRL_EXTRACT(lfo1ctrl))
799 : vcf_res_ctrl_none;
800 uint16_t eg3depth = _3ewa->ReadUint16();
801 EG3Depth = (eg3depth <= 1200) ? eg3depth /* positives */
802 : (-1) * (int16_t) ((eg3depth ^ 0xffff) + 1); /* binary complementary for negatives */
803 _3ewa->ReadInt16(); // unknown
804 ChannelOffset = _3ewa->ReadUint8() / 4;
805 uint8_t regoptions = _3ewa->ReadUint8();
806 MSDecode = regoptions & 0x01; // bit 0
807 SustainDefeat = regoptions & 0x02; // bit 1
808 _3ewa->ReadInt16(); // unknown
809 VelocityUpperLimit = _3ewa->ReadInt8();
810 _3ewa->ReadInt8(); // unknown
811 _3ewa->ReadInt16(); // unknown
812 ReleaseTriggerDecay = _3ewa->ReadUint8(); // release trigger decay
813 _3ewa->ReadInt8(); // unknown
814 _3ewa->ReadInt8(); // unknown
815 EG1Hold = _3ewa->ReadUint8() & 0x80; // bit 7
816 uint8_t vcfcutoff = _3ewa->ReadUint8();
817 VCFEnabled = vcfcutoff & 0x80; // bit 7
818 VCFCutoff = vcfcutoff & 0x7f; // lower 7 bits
819 VCFCutoffController = static_cast<vcf_cutoff_ctrl_t>(_3ewa->ReadUint8());
820 VCFVelocityScale = _3ewa->ReadUint8();
821 _3ewa->ReadInt8(); // unknown
822 uint8_t vcfresonance = _3ewa->ReadUint8();
823 VCFResonance = vcfresonance & 0x7f; // lower 7 bits
824 VCFResonanceDynamic = !(vcfresonance & 0x80); // bit 7
825 uint8_t vcfbreakpoint = _3ewa->ReadUint8();
826 VCFKeyboardTracking = vcfbreakpoint & 0x80; // bit 7
827 VCFKeyboardTrackingBreakpoint = vcfbreakpoint & 0x7f; // lower 7 bits
828 uint8_t vcfvelocity = _3ewa->ReadUint8();
829 VCFVelocityDynamicRange = vcfvelocity % 5;
830 VCFVelocityCurve = static_cast<curve_type_t>(vcfvelocity / 5);
831 VCFType = static_cast<vcf_type_t>(_3ewa->ReadUint8());
832
833 // get the corresponding velocity->volume table from the table map or create & calculate that table if it doesn't exist yet
834 uint32_t tableKey = (VelocityResponseCurve<<16) | (VelocityResponseDepth<<8) | VelocityResponseCurveScaling;
835 if (pVelocityTables->count(tableKey)) { // if key exists
836 pVelocityAttenuationTable = (*pVelocityTables)[tableKey];
837 }
838 else {
839 pVelocityAttenuationTable =
840 CreateVelocityTable(VelocityResponseCurve,
841 VelocityResponseDepth,
842 VelocityResponseCurveScaling);
843 (*pVelocityTables)[tableKey] = pVelocityAttenuationTable; // put the new table into the tables map
844 }
845 }
846
847 leverage_ctrl_t DimensionRegion::DecodeLeverageController(_lev_ctrl_t EncodedController) {
848 leverage_ctrl_t decodedcontroller;
849 switch (EncodedController) {
850 // special controller
851 case _lev_ctrl_none:
852 decodedcontroller.type = leverage_ctrl_t::type_none;
853 decodedcontroller.controller_number = 0;
854 break;
855 case _lev_ctrl_velocity:
856 decodedcontroller.type = leverage_ctrl_t::type_velocity;
857 decodedcontroller.controller_number = 0;
858 break;
859 case _lev_ctrl_channelaftertouch:
860 decodedcontroller.type = leverage_ctrl_t::type_channelaftertouch;
861 decodedcontroller.controller_number = 0;
862 break;
863
864 // ordinary MIDI control change controller
865 case _lev_ctrl_modwheel:
866 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
867 decodedcontroller.controller_number = 1;
868 break;
869 case _lev_ctrl_breath:
870 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
871 decodedcontroller.controller_number = 2;
872 break;
873 case _lev_ctrl_foot:
874 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
875 decodedcontroller.controller_number = 4;
876 break;
877 case _lev_ctrl_effect1:
878 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
879 decodedcontroller.controller_number = 12;
880 break;
881 case _lev_ctrl_effect2:
882 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
883 decodedcontroller.controller_number = 13;
884 break;
885 case _lev_ctrl_genpurpose1:
886 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
887 decodedcontroller.controller_number = 16;
888 break;
889 case _lev_ctrl_genpurpose2:
890 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
891 decodedcontroller.controller_number = 17;
892 break;
893 case _lev_ctrl_genpurpose3:
894 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
895 decodedcontroller.controller_number = 18;
896 break;
897 case _lev_ctrl_genpurpose4:
898 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
899 decodedcontroller.controller_number = 19;
900 break;
901 case _lev_ctrl_portamentotime:
902 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
903 decodedcontroller.controller_number = 5;
904 break;
905 case _lev_ctrl_sustainpedal:
906 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
907 decodedcontroller.controller_number = 64;
908 break;
909 case _lev_ctrl_portamento:
910 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
911 decodedcontroller.controller_number = 65;
912 break;
913 case _lev_ctrl_sostenutopedal:
914 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
915 decodedcontroller.controller_number = 66;
916 break;
917 case _lev_ctrl_softpedal:
918 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
919 decodedcontroller.controller_number = 67;
920 break;
921 case _lev_ctrl_genpurpose5:
922 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
923 decodedcontroller.controller_number = 80;
924 break;
925 case _lev_ctrl_genpurpose6:
926 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
927 decodedcontroller.controller_number = 81;
928 break;
929 case _lev_ctrl_genpurpose7:
930 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
931 decodedcontroller.controller_number = 82;
932 break;
933 case _lev_ctrl_genpurpose8:
934 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
935 decodedcontroller.controller_number = 83;
936 break;
937 case _lev_ctrl_effect1depth:
938 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
939 decodedcontroller.controller_number = 91;
940 break;
941 case _lev_ctrl_effect2depth:
942 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
943 decodedcontroller.controller_number = 92;
944 break;
945 case _lev_ctrl_effect3depth:
946 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
947 decodedcontroller.controller_number = 93;
948 break;
949 case _lev_ctrl_effect4depth:
950 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
951 decodedcontroller.controller_number = 94;
952 break;
953 case _lev_ctrl_effect5depth:
954 decodedcontroller.type = leverage_ctrl_t::type_controlchange;
955 decodedcontroller.controller_number = 95;
956 break;
957
958 // unknown controller type
959 default:
960 throw gig::Exception("Unknown leverage controller type.");
961 }
962 return decodedcontroller;
963 }
964
965 DimensionRegion::~DimensionRegion() {
966 Instances--;
967 if (!Instances) {
968 // delete the velocity->volume tables
969 VelocityTableMap::iterator iter;
970 for (iter = pVelocityTables->begin(); iter != pVelocityTables->end(); iter++) {
971 double* pTable = iter->second;
972 if (pTable) delete[] pTable;
973 }
974 pVelocityTables->clear();
975 delete pVelocityTables;
976 pVelocityTables = NULL;
977 }
978 }
979
980 /**
981 * Returns the correct amplitude factor for the given \a MIDIKeyVelocity.
982 * All involved parameters (VelocityResponseCurve, VelocityResponseDepth
983 * and VelocityResponseCurveScaling) involved are taken into account to
984 * calculate the amplitude factor. Use this method when a key was
985 * triggered to get the volume with which the sample should be played
986 * back.
987 *
988 * @param MIDIKeyVelocity MIDI velocity value of the triggered key (between 0 and 127)
989 * @returns amplitude factor (between 0.0 and 1.0)
990 */
991 double DimensionRegion::GetVelocityAttenuation(uint8_t MIDIKeyVelocity) {
992 return pVelocityAttenuationTable[MIDIKeyVelocity];
993 }
994
995 double* DimensionRegion::CreateVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling) {
996
997 // line-segment approximations of the 15 velocity curves
998
999 // linear
1000 const int lin0[] = { 1, 1, 127, 127 };
1001 const int lin1[] = { 1, 21, 127, 127 };
1002 const int lin2[] = { 1, 45, 127, 127 };
1003 const int lin3[] = { 1, 74, 127, 127 };
1004 const int lin4[] = { 1, 127, 127, 127 };
1005
1006 // non-linear
1007 const int non0[] = { 1, 4, 24, 5, 57, 17, 92, 57, 122, 127, 127, 127 };
1008 const int non1[] = { 1, 4, 46, 9, 93, 56, 118, 106, 123, 127,
1009 127, 127 };
1010 const int non2[] = { 1, 4, 46, 9, 57, 20, 102, 107, 107, 127,
1011 127, 127 };
1012 const int non3[] = { 1, 15, 10, 19, 67, 73, 80, 80, 90, 98, 98, 127,
1013 127, 127 };
1014 const int non4[] = { 1, 25, 33, 57, 82, 81, 92, 127, 127, 127 };
1015
1016 // special
1017 const int spe0[] = { 1, 2, 76, 10, 90, 15, 95, 20, 99, 28, 103, 44,
1018 113, 127, 127, 127 };
1019 const int spe1[] = { 1, 2, 27, 5, 67, 18, 89, 29, 95, 35, 107, 67,
1020 118, 127, 127, 127 };
1021 const int spe2[] = { 1, 1, 33, 1, 53, 5, 61, 13, 69, 32, 79, 74,
1022 85, 90, 91, 127, 127, 127 };
1023 const int spe3[] = { 1, 32, 28, 35, 66, 48, 89, 59, 95, 65, 99, 73,
1024 117, 127, 127, 127 };
1025 const int spe4[] = { 1, 4, 23, 5, 49, 13, 57, 17, 92, 57, 122, 127,
1026 127, 127 };
1027
1028 const int* const curves[] = { non0, non1, non2, non3, non4,
1029 lin0, lin1, lin2, lin3, lin4,
1030 spe0, spe1, spe2, spe3, spe4 };
1031
1032 double* const table = new double[128];
1033
1034 const int* curve = curves[curveType * 5 + depth];
1035 const int s = scaling == 0 ? 20 : scaling; // 0 or 20 means no scaling
1036
1037 table[0] = 0;
1038 for (int x = 1 ; x < 128 ; x++) {
1039
1040 if (x > curve[2]) curve += 2;
1041 double y = curve[1] + (x - curve[0]) *
1042 (double(curve[3] - curve[1]) / (curve[2] - curve[0]));
1043 y = y / 127;
1044
1045 // Scale up for s > 20, down for s < 20. When
1046 // down-scaling, the curve still ends at 1.0.
1047 if (s < 20 && y >= 0.5)
1048 y = y / ((2 - 40.0 / s) * y + 40.0 / s - 1);
1049 else
1050 y = y * (s / 20.0);
1051 if (y > 1) y = 1;
1052
1053 table[x] = y;
1054 }
1055 return table;
1056 }
1057
1058
1059 // *************** Region ***************
1060 // *
1061
1062 Region::Region(Instrument* pInstrument, RIFF::List* rgnList) : DLS::Region((DLS::Instrument*) pInstrument, rgnList) {
1063 // Initialization
1064 Dimensions = 0;
1065 for (int i = 0; i < 32; i++) {
1066 pDimensionRegions[i] = NULL;
1067 }
1068 Layers = 1;
1069
1070 // Actual Loading
1071
1072 LoadDimensionRegions(rgnList);
1073
1074 RIFF::Chunk* _3lnk = rgnList->GetSubChunk(CHUNK_ID_3LNK);
1075 if (_3lnk) {
1076 DimensionRegions = _3lnk->ReadUint32();
1077 for (int i = 0; i < 5; i++) {
1078 dimension_t dimension = static_cast<dimension_t>(_3lnk->ReadUint8());
1079 uint8_t bits = _3lnk->ReadUint8();
1080 if (dimension == dimension_none) { // inactive dimension
1081 pDimensionDefinitions[i].dimension = dimension_none;
1082 pDimensionDefinitions[i].bits = 0;
1083 pDimensionDefinitions[i].zones = 0;
1084 pDimensionDefinitions[i].split_type = split_type_bit;
1085 pDimensionDefinitions[i].ranges = NULL;
1086 pDimensionDefinitions[i].zone_size = 0;
1087 }
1088 else { // active dimension
1089 pDimensionDefinitions[i].dimension = dimension;
1090 pDimensionDefinitions[i].bits = bits;
1091 pDimensionDefinitions[i].zones = 0x01 << bits; // = pow(2,bits)
1092 pDimensionDefinitions[i].split_type = (dimension == dimension_layer ||
1093 dimension == dimension_samplechannel ||
1094 dimension == dimension_releasetrigger) ? split_type_bit
1095 : split_type_normal;
1096 pDimensionDefinitions[i].ranges = NULL; // it's not possible to check velocity dimensions for custom defined ranges at this point
1097 pDimensionDefinitions[i].zone_size =
1098 (pDimensionDefinitions[i].split_type == split_type_normal) ? 128 / pDimensionDefinitions[i].zones
1099 : 0;
1100 Dimensions++;
1101
1102 // if this is a layer dimension, remember the amount of layers
1103 if (dimension == dimension_layer) Layers = pDimensionDefinitions[i].zones;
1104 }
1105 _3lnk->SetPos(6, RIFF::stream_curpos); // jump forward to next dimension definition
1106 }
1107
1108 // check velocity dimension (if there is one) for custom defined zone ranges
1109 for (uint i = 0; i < Dimensions; i++) {
1110 dimension_def_t* pDimDef = pDimensionDefinitions + i;
1111 if (pDimDef->dimension == dimension_velocity) {
1112 if (pDimensionRegions[0]->VelocityUpperLimit == 0) {
1113 // no custom defined ranges
1114 pDimDef->split_type = split_type_normal;
1115 pDimDef->ranges = NULL;
1116 }
1117 else { // custom defined ranges
1118 pDimDef->split_type = split_type_customvelocity;
1119 pDimDef->ranges = new range_t[pDimDef->zones];
1120 unsigned int bits[5] = {0,0,0,0,0};
1121 int previousUpperLimit = -1;
1122 for (int velocityZone = 0; velocityZone < pDimDef->zones; velocityZone++) {
1123 bits[i] = velocityZone;
1124 DimensionRegion* pDimRegion = GetDimensionRegionByBit(bits[4],bits[3],bits[2],bits[1],bits[0]);
1125
1126 pDimDef->ranges[velocityZone].low = previousUpperLimit + 1;
1127 pDimDef->ranges[velocityZone].high = pDimRegion->VelocityUpperLimit;
1128 previousUpperLimit = pDimDef->ranges[velocityZone].high;
1129 // fill velocity table
1130 for (int i = pDimDef->ranges[velocityZone].low; i <= pDimDef->ranges[velocityZone].high; i++) {
1131 VelocityTable[i] = velocityZone;
1132 }
1133 }
1134 }
1135 }
1136 }
1137
1138 // load sample references
1139 _3lnk->SetPos(44); // jump to start of the wave pool indices (if not already there)
1140 for (uint i = 0; i < DimensionRegions; i++) {
1141 uint32_t wavepoolindex = _3lnk->ReadUint32();
1142 pDimensionRegions[i]->pSample = GetSampleFromWavePool(wavepoolindex);
1143 }
1144 }
1145 else throw gig::Exception("Mandatory <3lnk> chunk not found.");
1146 }
1147
1148 void Region::LoadDimensionRegions(RIFF::List* rgn) {
1149 RIFF::List* _3prg = rgn->GetSubList(LIST_TYPE_3PRG);
1150 if (_3prg) {
1151 int dimensionRegionNr = 0;
1152 RIFF::List* _3ewl = _3prg->GetFirstSubList();
1153 while (_3ewl) {
1154 if (_3ewl->GetListType() == LIST_TYPE_3EWL) {
1155 pDimensionRegions[dimensionRegionNr] = new DimensionRegion(_3ewl);
1156 dimensionRegionNr++;
1157 }
1158 _3ewl = _3prg->GetNextSubList();
1159 }
1160 if (dimensionRegionNr == 0) throw gig::Exception("No dimension region found.");
1161 }
1162 }
1163
1164 Region::~Region() {
1165 for (uint i = 0; i < Dimensions; i++) {
1166 if (pDimensionDefinitions[i].ranges) delete[] pDimensionDefinitions[i].ranges;
1167 }
1168 for (int i = 0; i < 32; i++) {
1169 if (pDimensionRegions[i]) delete pDimensionRegions[i];
1170 }
1171 }
1172
1173 /**
1174 * Use this method in your audio engine to get the appropriate dimension
1175 * region with it's articulation data for the current situation. Just
1176 * call the method with the current MIDI controller values and you'll get
1177 * the DimensionRegion with the appropriate articulation data for the
1178 * current situation (for this Region of course only). To do that you'll
1179 * first have to look which dimensions with which controllers and in
1180 * which order are defined for this Region when you load the .gig file.
1181 * Special cases are e.g. layer or channel dimensions where you just put
1182 * in the index numbers instead of a MIDI controller value (means 0 for
1183 * left channel, 1 for right channel or 0 for layer 0, 1 for layer 1,
1184 * etc.).
1185 *
1186 * @param Dim4Val MIDI controller value (0-127) for dimension 4
1187 * @param Dim3Val MIDI controller value (0-127) for dimension 3
1188 * @param Dim2Val MIDI controller value (0-127) for dimension 2
1189 * @param Dim1Val MIDI controller value (0-127) for dimension 1
1190 * @param Dim0Val MIDI controller value (0-127) for dimension 0
1191 * @returns adress to the DimensionRegion for the given situation
1192 * @see pDimensionDefinitions
1193 * @see Dimensions
1194 */
1195 DimensionRegion* Region::GetDimensionRegionByValue(uint Dim4Val, uint Dim3Val, uint Dim2Val, uint Dim1Val, uint Dim0Val) {
1196 uint8_t bits[5] = {Dim0Val,Dim1Val,Dim2Val,Dim3Val,Dim4Val};
1197 for (uint i = 0; i < Dimensions; i++) {
1198 switch (pDimensionDefinitions[i].split_type) {
1199 case split_type_normal:
1200 bits[i] /= pDimensionDefinitions[i].zone_size;
1201 break;
1202 case split_type_customvelocity:
1203 bits[i] = VelocityTable[bits[i]];
1204 break;
1205 case split_type_bit: // the value is already the sought dimension bit number
1206 const uint8_t limiter_mask = (0xff << pDimensionDefinitions[i].bits) ^ 0xff;
1207 bits[i] = bits[i] & limiter_mask; // just make sure the value don't uses more bits than allowed
1208 break;
1209 }
1210 }
1211 return GetDimensionRegionByBit(bits[4],bits[3],bits[2],bits[1],bits[0]);
1212 }
1213
1214 /**
1215 * Returns the appropriate DimensionRegion for the given dimension bit
1216 * numbers (zone index). You usually use <i>GetDimensionRegionByValue</i>
1217 * instead of calling this method directly!
1218 *
1219 * @param Dim4Bit Bit number for dimension 4
1220 * @param Dim3Bit Bit number for dimension 3
1221 * @param Dim2Bit Bit number for dimension 2
1222 * @param Dim1Bit Bit number for dimension 1
1223 * @param Dim0Bit Bit number for dimension 0
1224 * @returns adress to the DimensionRegion for the given dimension
1225 * bit numbers
1226 * @see GetDimensionRegionByValue()
1227 */
1228 DimensionRegion* Region::GetDimensionRegionByBit(uint8_t Dim4Bit, uint8_t Dim3Bit, uint8_t Dim2Bit, uint8_t Dim1Bit, uint8_t Dim0Bit) {
1229 return *(pDimensionRegions + ((((((((Dim4Bit << pDimensionDefinitions[3].bits) | Dim3Bit)
1230 << pDimensionDefinitions[2].bits) | Dim2Bit)
1231 << pDimensionDefinitions[1].bits) | Dim1Bit)
1232 << pDimensionDefinitions[0].bits) | Dim0Bit) );
1233 }
1234
1235 /**
1236 * Returns pointer address to the Sample referenced with this region.
1237 * This is the global Sample for the entire Region (not sure if this is
1238 * actually used by the Gigasampler engine - I would only use the Sample
1239 * referenced by the appropriate DimensionRegion instead of this sample).
1240 *
1241 * @returns address to Sample or NULL if there is no reference to a
1242 * sample saved in the .gig file
1243 */
1244 Sample* Region::GetSample() {
1245 if (pSample) return static_cast<gig::Sample*>(pSample);
1246 else return static_cast<gig::Sample*>(pSample = GetSampleFromWavePool(WavePoolTableIndex));
1247 }
1248
1249 Sample* Region::GetSampleFromWavePool(unsigned int WavePoolTableIndex) {
1250 File* file = (File*) GetParent()->GetParent();
1251 unsigned long soughtoffset = file->pWavePoolTable[WavePoolTableIndex];
1252 Sample* sample = file->GetFirstSample();
1253 while (sample) {
1254 if (sample->ulWavePoolOffset == soughtoffset) return static_cast<gig::Sample*>(pSample = sample);
1255 sample = file->GetNextSample();
1256 }
1257 return NULL;
1258 }
1259
1260
1261
1262 // *************** Instrument ***************
1263 // *
1264
1265 Instrument::Instrument(File* pFile, RIFF::List* insList) : DLS::Instrument((DLS::File*)pFile, insList) {
1266 // Initialization
1267 for (int i = 0; i < 128; i++) RegionKeyTable[i] = NULL;
1268 RegionIndex = -1;
1269
1270 // Loading
1271 RIFF::List* lart = insList->GetSubList(LIST_TYPE_LART);
1272 if (lart) {
1273 RIFF::Chunk* _3ewg = lart->GetSubChunk(CHUNK_ID_3EWG);
1274 if (_3ewg) {
1275 EffectSend = _3ewg->ReadUint16();
1276 Attenuation = _3ewg->ReadInt32();
1277 FineTune = _3ewg->ReadInt16();
1278 PitchbendRange = _3ewg->ReadInt16();
1279 uint8_t dimkeystart = _3ewg->ReadUint8();
1280 PianoReleaseMode = dimkeystart & 0x01;
1281 DimensionKeyRange.low = dimkeystart >> 1;
1282 DimensionKeyRange.high = _3ewg->ReadUint8();
1283 }
1284 else throw gig::Exception("Mandatory <3ewg> chunk not found.");
1285 }
1286 else throw gig::Exception("Mandatory <lart> list chunk not found.");
1287
1288 RIFF::List* lrgn = insList->GetSubList(LIST_TYPE_LRGN);
1289 if (!lrgn) throw gig::Exception("Mandatory chunks in <ins > chunk not found.");
1290 pRegions = new Region*[Regions];
1291 RIFF::List* rgn = lrgn->GetFirstSubList();
1292 unsigned int iRegion = 0;
1293 while (rgn) {
1294 if (rgn->GetListType() == LIST_TYPE_RGN) {
1295 pRegions[iRegion] = new Region(this, rgn);
1296 iRegion++;
1297 }
1298 rgn = lrgn->GetNextSubList();
1299 }
1300
1301 // Creating Region Key Table for fast lookup
1302 for (uint iReg = 0; iReg < Regions; iReg++) {
1303 for (int iKey = pRegions[iReg]->KeyRange.low; iKey <= pRegions[iReg]->KeyRange.high; iKey++) {
1304 RegionKeyTable[iKey] = pRegions[iReg];
1305 }
1306 }
1307 }
1308
1309 Instrument::~Instrument() {
1310 for (uint i = 0; i < Regions; i++) {
1311 if (pRegions) {
1312 if (pRegions[i]) delete (pRegions[i]);
1313 }
1314 delete[] pRegions;
1315 }
1316 }
1317
1318 /**
1319 * Returns the appropriate Region for a triggered note.
1320 *
1321 * @param Key MIDI Key number of triggered note / key (0 - 127)
1322 * @returns pointer adress to the appropriate Region or NULL if there
1323 * there is no Region defined for the given \a Key
1324 */
1325 Region* Instrument::GetRegion(unsigned int Key) {
1326 if (!pRegions || Key > 127) return NULL;
1327 return RegionKeyTable[Key];
1328 /*for (int i = 0; i < Regions; i++) {
1329 if (Key <= pRegions[i]->KeyRange.high &&
1330 Key >= pRegions[i]->KeyRange.low) return pRegions[i];
1331 }
1332 return NULL;*/
1333 }
1334
1335 /**
1336 * Returns the first Region of the instrument. You have to call this
1337 * method once before you use GetNextRegion().
1338 *
1339 * @returns pointer address to first region or NULL if there is none
1340 * @see GetNextRegion()
1341 */
1342 Region* Instrument::GetFirstRegion() {
1343 if (!Regions) return NULL;
1344 RegionIndex = 1;
1345 return pRegions[0];
1346 }
1347
1348 /**
1349 * Returns the next Region of the instrument. You have to call
1350 * GetFirstRegion() once before you can use this method. By calling this
1351 * method multiple times it iterates through the available Regions.
1352 *
1353 * @returns pointer address to the next region or NULL if end reached
1354 * @see GetFirstRegion()
1355 */
1356 Region* Instrument::GetNextRegion() {
1357 if (RegionIndex < 0 || RegionIndex >= Regions) return NULL;
1358 return pRegions[RegionIndex++];
1359 }
1360
1361
1362
1363 // *************** File ***************
1364 // *
1365
1366 File::File(RIFF::File* pRIFF) : DLS::File(pRIFF) {
1367 pSamples = NULL;
1368 pInstruments = NULL;
1369 }
1370
1371 Sample* File::GetFirstSample() {
1372 if (!pSamples) LoadSamples();
1373 if (!pSamples) return NULL;
1374 SamplesIterator = pSamples->begin();
1375 return static_cast<gig::Sample*>( (SamplesIterator != pSamples->end()) ? *SamplesIterator : NULL );
1376 }
1377
1378 Sample* File::GetNextSample() {
1379 if (!pSamples) return NULL;
1380 SamplesIterator++;
1381 return static_cast<gig::Sample*>( (SamplesIterator != pSamples->end()) ? *SamplesIterator : NULL );
1382 }
1383
1384 void File::LoadSamples() {
1385 RIFF::List* wvpl = pRIFF->GetSubList(LIST_TYPE_WVPL);
1386 if (wvpl) {
1387 unsigned long wvplFileOffset = wvpl->GetFilePos();
1388 RIFF::List* wave = wvpl->GetFirstSubList();
1389 while (wave) {
1390 if (wave->GetListType() == LIST_TYPE_WAVE) {
1391 if (!pSamples) pSamples = new SampleList;
1392 unsigned long waveFileOffset = wave->GetFilePos();
1393 pSamples->push_back(new Sample(this, wave, waveFileOffset - wvplFileOffset));
1394 }
1395 wave = wvpl->GetNextSubList();
1396 }
1397 }
1398 else throw gig::Exception("Mandatory <wvpl> chunk not found.");
1399 }
1400
1401 Instrument* File::GetFirstInstrument() {
1402 if (!pInstruments) LoadInstruments();
1403 if (!pInstruments) return NULL;
1404 InstrumentsIterator = pInstruments->begin();
1405 return (InstrumentsIterator != pInstruments->end()) ? *InstrumentsIterator : NULL;
1406 }
1407
1408 Instrument* File::GetNextInstrument() {
1409 if (!pInstruments) return NULL;
1410 InstrumentsIterator++;
1411 return (InstrumentsIterator != pInstruments->end()) ? *InstrumentsIterator : NULL;
1412 }
1413
1414 /**
1415 * Returns the instrument with the given index.
1416 *
1417 * @returns sought instrument or NULL if there's no such instrument
1418 */
1419 Instrument* File::GetInstrument(uint index) {
1420 if (!pInstruments) LoadInstruments();
1421 if (!pInstruments) return NULL;
1422 InstrumentsIterator = pInstruments->begin();
1423 for (uint i = 0; InstrumentsIterator != pInstruments->end(); i++) {
1424 if (i == index) return *InstrumentsIterator;
1425 InstrumentsIterator++;
1426 }
1427 return NULL;
1428 }
1429
1430 void File::LoadInstruments() {
1431 RIFF::List* lstInstruments = pRIFF->GetSubList(LIST_TYPE_LINS);
1432 if (lstInstruments) {
1433 RIFF::List* lstInstr = lstInstruments->GetFirstSubList();
1434 while (lstInstr) {
1435 if (lstInstr->GetListType() == LIST_TYPE_INS) {
1436 if (!pInstruments) pInstruments = new InstrumentList;
1437 pInstruments->push_back(new Instrument(this, lstInstr));
1438 }
1439 lstInstr = lstInstruments->GetNextSubList();
1440 }
1441 }
1442 else throw gig::Exception("Mandatory <lins> list chunk not found.");
1443 }
1444
1445
1446
1447 // *************** Exception ***************
1448 // *
1449
1450 Exception::Exception(String Message) : DLS::Exception(Message) {
1451 }
1452
1453 void Exception::PrintMessage() {
1454 std::cout << "gig::Exception: " << Message << std::endl;
1455 }
1456
1457 } // namespace gig

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